Is Hurska Sweet-Tooth legal in Standard, Modern, and Commander?

Hurska Sweet-Tooth is legal in: Legacy, Vintage, Commander, Historic.

What type of card is Hurska Sweet-Tooth?

Hurska Sweet-Tooth is a Legendary Creature — Bear. Its oracle text reads: "Whenever Hurska attacks, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.") Whenever you gain life, you may pay {G/W}. When you do, target creature gets +X/+X until end of turn, where X is the amount of life you gained."